21286376

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{61879}}^1$

素因数の和:61928

約数の個数: 16

約数和(自身を含む): 40840800

約数和(自身を除く): 19554424

約数列:

[1, 2, 4, 8, 43, 86, 172, 344, 61879, 123758, 247516, 495032, 2660797, 5321594, 10643188, 21286376]

約数ペア:

[(1, 21286376), (2, 10643188), (4, 5321594), (8, 2660797), (43, 495032), (86, 247516), (172, 123758), (344, 61879)]